Reene



(No Model.)

M 4 Sheets-Sheet 1. M. GREENE. vI RZGEEJUFHZ INDICATOR.

Patemd Sept. 26, 1893.

a N0 Model.)

4 Sheets-Sheet a M. GREENE. PRESSURE INDICATOR. N0. 505,652 Pateiited Sept. 26, 1893.

\ A i i i 1 5 a 1 A g 1 w i M M i 5'27 (liter/mews" 4 Sheets-$heet 3.

(No Model.)

M GREENE PRESSURE INDICATOR.

.lafiented Sept; 26', 1893.

w; f nesse/a (No Model.)

M.GREJENB.-

4 Shets-Sheet 4] PRESSURE INDICATOR.

Patented Sept, 26, 1893 L" si l wanton @AWH l tia.

MERRITT GREENE, OF PITTSBURG, PElll lFulZl'fV'Jl Q 'flfiIflCATION forming part of Letters Patent lilo. 505,652, dated itepternher Application tiled lllareh 10,1893. Serial l l'c. t=65 351= (No model;

To all whom it may concern.-

" Be it known that I, MERRITT GREENE, a citi zen of the United- States, residing at Pittsburg, in the countyvof Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Pressure-Indicators for Air or Gas; and I do hereby declare the following to be a full, clear, and exact deures, and its object is to furnish a measuring.

and registering instrument that shall be portable, so that it may be carried about to natural gas wells or shifted about in factories;

easy of application, so that it may commend itself as a practicable machine, and accurate, so that its measurements may be accepted without controversy.

In the machine embodying the invention, a positively known area forthe passage of gas or air is associated with a positively determined pressure of gas or air passing through that opening, so that by means of an adjust able gage for determining pressure and an adj ustable valve for regulating area, it is possible to know accurately both the volu me and amount of gas or air passing through the.

meter.

In the accompanying drawings, wherein like letters represent like parts, Figure 1 is a side elevation of the meter at rest; Fig. 2, a "horizontal, lengthwise sectional view on the line :n-ro qt the first figure; Fig. 3, a vertical, lengthwise sectional view, taken centrally and showing the meter in operation; Fig. 4, a

vertical, crosswise section on the line 'g-- y of the first figure ta can from the rear; and Fig. a side elevation, like the first figure, showing a modification to be described.

A is a hollow cylinder, closed at both ends; the closure being elfected by screw caps, a, preferably. ()flfset from the cylinder, near what shall be regarded as its rear cnd,js a tube, 15, communicating with the cylinder through a rectangular orifice, I), and with ts open outer end screw threaded or otherwise suitably adapted to make a gastight connection with a pipe-coupling fitted thereto. Similarly ollsct from the cylinder, near its center orifice c in one of the offset tubes oi. the e'rl he made.

and in the opposite direction from the other offset,1s a like tube coiunruu sting with the cylinder through ec an or fice, 6,, T5 of the same size as the critic. 3/ men tioned,and ta open o er screw threaded. ut' otherwise aux. adapted to make a gas-tight connection apieacnud ling. u be Fitting closely but morahiy 'i'lil n 1" izulcr is a hollow piston, it), entirely open at its rear end, and has 1-; a re: guitar slot,

(1, a little forward said end, corre sponding in size and lines of direction to the inder. Inserted through and projected from the front and otherwise closed end he thcqoiston is a tubular shaft, lit, serewthreadedf on. its outside and passing freely through the front end of the cylinder A, which is provided with an orifice, o; a, for the projection of the shaft. A hand wheel, i5, mounted upon the shaft, the interior its huh being screw threaded to engage the threaded nurhee OllI the shaft. The-hub ef the is formed on its inner vertical face into 111a, which fits against the front ende'l that linrlcr, and

this rim is embraced by solar, rah, fast upon the end ot the cylinder.

Within and projecting from the tubular. shaft is a rod, ll, having that inner end suitably packed fitting the be of the shaft. Around the steznei. l'hisrcd nieces spiral spring, ll, the ends oi w! ateti in recessed washers, ii, whe" washer bears against the he the outer against sever. n into the mouth of the tubular lnlit through longitudinally for the stem. oi the rod within the Upon the tubular shalt, outside of the threaded. niboreti agent" the es hand wheel, is fastened oueend. of ayolze,wl;rere of the vertical. partis projeetediute in 10, While the horizontal part is g. vertical link, M, which is pivoted to a horn zontal linlgN, to which further reference e'il a taste wlr (in top of the cylinder i O, supporting a dial, if an indicator, 1%, the base into a segmontalraelr, meshed with a rack, t5, traveling upon a Wheels, l, supported. in the wheel, t, mounted on the dial, bears down upon the outer end of the straight rack.

Pivotcd to the bracket of the yoke, so as to swing thereon, is a lever, U, the lower-end of which is pivoted to the end of the rod projecting from the before mentioned tubular shaft. The upper end is pivoted to a horizontal bar, V, which is pivoted near the center of the aforesaid vertical link M, which, as already stated, is pivoted to the? horizontal link N, and this last named link is pivoted. to the proximate end of the straight rack supported upon the frame on top of the cylinder.

In the operation of the machine the gas or air to be registered as to its pressure enters the offset tube B through a pipe coupling.

By rotation of the hand wheel F, the piston D is drawn forward within the cylinder A till it begins to uncover the rectangular orifice b, when the supply will begin to enter the cylinder,and pass into the piston through its open end. 4 Simultaneously with the uncovering of the orificeb will begin the uncovering of the rectangular orifice c, in the offset tube C, by means of the rectangular slot d in the piston, and the area of opening in the two orifices, b

- and c, will'be always the same. This area of opening lie-indicating in square inches upon the dial, as exemplified by the curved bottom row of figures upon the dial shown in the first and third figures of the drawings, which figures upon the dial are given iua progression of half inches, though any desired units of progression, and any desired standards of area, may he used in a machine of this construction. Eachpf these units, progressing by half inches upon the dial as herein repre-- sented, is a zero point in. theseries of scales used for the dilferent port areas of the device; that is, the different positionsof the piston D in the large cylinderof the machine.

.dial, when the hollow The indicator being at zero, on the left of the piston is so adjusted within the cylinder as that its next movement will begin the admission of gas or air, each revolution of the hand wheel, in moving the piston, will move the at'orsaid yoke outward, causing it to pull. forward the straight rack upon the dial, and moving the indicator toward the right, and so'measuring along the lower line of figurcshthearearofnopening through which gas is flowing. Following the adjustment and measu remont of area, the pressure of'tho or aim-admitted to the hollow piston will be received Within the tubular'shaft, upon the head of the rod therein, and so against the spiral spring around the rod. That spring liaving,'l)y means ofths screw plug forming an adjustable bearing for it at oncof its ends, been regulated to trans-i mit the pressure in units of pounds, or other wise, and the ad ustment being harmonized,

in a manner familiar to gas engineers and other machinists, with the mechanical ad- ,justment for area, it follows that when the arcaof opening for gas or air flow is trans mittcd to the indicator, the upright lever atplugfiittcd adj ustabl y eoaehs tached to the projecting rod within the tubular shaft of the piston transmits to the indicator at the same time the amount of pressure exerted through the amount of area registered by the indicator.

in the drawings herewith, the series of numbers in diagonal columns for denoting the amount of pressure per square inch of area is calculated in pounds, and the values of the series of numbers on any diaJ will vary according to the size of the machine, and the greatness or smallness of the area through which pressure is to be exerted, whether the unit for pressure be a pound or otherwise.

in the modification shown by the fifth figure of the drawings, a small dial, W, is attached to the aforesaid yoke of the machine and moves in and out with the movement of its support. A pointer, 10, is fixed to the projeciing end of the rod G and stands at zero upon the dial when the gas is shut out of the cylinder, but moves to the figure 10 upon thelittle dial when the spring is suitably adjusted by the screw plug and'tho pressure reaches just ten pounds per square inch of gas flow. (Ljhe little dial may be 'gagedto other than ten pound pressures, if desired. The large dial P is spaced as shown in the third figure of the drawings and the spaces are marked with the number otcubic feet of that will pass, at ten pounds or some other predetermined pressure, through areascorrosponding to the scales of figures.

Having thus described my invention, I claim the following: 1. A new apparatus for indicating the press- 11 re of gas or air at high pressure, combining for its necessary and coacting parts the 1101". low, closed cylinder, having the orifice and the collar at its near the rear end of the cylinder, having the rectangular orifice at its inner end; the'ofiset tube near the center ofthe cylinder, in opposite direction to the aforesaid offset tube and having the rectangular orifice at its inner end; the hollow piston fitting closely yet; moving lar orifice near its rear end; the tubular shaft, communicating with the hollow piston and projected from the front end thereof; the hand wheel screw threaded upon the tubular shafh having the rim on its. inner face, embraced by the collar ofthe aforesaid cylinder; the rod moving within andprojecting from the tubular shaft,having the head fittingthe tubularshat't, at its inner coiled loosely around against thehead thereof; the hollow screw within the mouth of the aforcsaidtubular shaft and bearing against the outer end oLtho spiral spring; the yoke fitted upon the outcmnd of the-tubular shaft and having the braokctprojected from its vertical and exterior surface; the vertical link pivoted to the horizontal end of the yoke;

I the horizontal link pivoted to onocnd of the vertical link; the frame mounted uponthe front end; the otfset tube I within the cylinder and having the rectangu- I end; the spiral spring the rodand bearing 1 25- aforesaid hollow cylinder; the dial supported 1 the aforesaid yoke; all constructed and arpose "upon the shaft,

ranged substantially as and for the purposes in'this specification described.

' 2. The combination in an air or gas pressure indicator of the hollow closed cylinder, having the orificeand the collar at itsfront end; the ofiset tube near the rear end or the cylinder, having the rectangular orifice at its inner end; the offset tube near the center of the cylinder, in opposite direction to the aforesaid oflset tube. and having the rectangular orifice at its inner end; the hollow piston, fit? ting closely, yetmoving within the cylinder and having the rectangular orifice near its rear end; the shaft projected from the front end thereof; the hand wheel screw threaded having the rim on its inner face, embraced by the collar of the aforesaid cylinder; ,thej'yokefitted upon the outer end of the shaft; the vertical link pivoted to the horizontal end of the yoke; the horizontal link pivoted to one end of the vertical link; the frame mounted upon the aforesaid hollow cylinder; the dial supported upon said 'frame; the movable indicator upon said dial and the straight rack meshed with'the segmental toothed base of the indicator and movably supported upon suitable wheels or rollere; the whole constructed and arranged substantially as herein described, for the purof registering the amount of gas or air passed into and out of the meter through a predetermined area for admission and discharge of the flow.

3. The combination in a pressure indicator for air or gas wherein the flow is received and discharged by a hollow piston working closely within the indicator case, of the dial,,properly spaced and inscribed with numbers denoting pressure in units of weight; the indicator,

pivoted to and moving over the face of the dial; the straight, movable rack,.suitably supported upon wheels or rollers and meshed" with the toothed, segmental foot of the indicater; the horizontal bar pivotally connected to the proximate end of the straight rack;- the upright lever, pivoted by its upper end to the horizontal bar and swung at or near its own center from a suitable support; the headed,. rod pivoted at its outer end to the lower end 3 of the swinging lever and communicating at its inner end with the hollow piston with:

in the indicator case; and the spiral spring,

seated within the tubular shaft proceeding from the hollow piston, also encircling the rod within said shaft and bearing by one end against the head of said rod and by theiother.

end against the adjustable tubular plug screwed into the mouth of theaforesaid tubular' shaft; the whole constructed and arranged substantially ashere'in described, .r'or the purpose of registering the amount of gas or air passed through the indicator ata known pressure within the hollow piston.

4. The combination in a pressure inditnrtonf for air or gas of the'hollow at its inner end; the chest tube nearrt center of the cylinder, in opposite directi n to the aforementioned. oflset tube mi i-M ing the rectangular orifice at itslinnere iils;

the hollow pistonclosely fitting and moving within the cylinder and having the rectangw of the cylinder, havingthe rectangular oriiilcesclosed cylinder?- having the orifice and the collar at its tor; ward end; the ofiset tube near the rear.

lar orifice near its rear end; the shaft proj ected from the front end of the hollow pis- 9 the hand wheelscrew threaded upon said; f

ton through the orifice of the cylinder, and

shaft and having the rim on its inner face,

embraced by the collar of the aforesaid cylinder; all substantially in the manner described, for the purpose of fixing the area of passage for the inflow and outflow of gas or air to be passed through the indicator.

Signed in the presence of two subscribing witnesses this 14th day of January, A. D. 1893. Y

MERRI'IT GREENE..

Witnesses:

'Gno. D. 'lmnnn, Jso. W. CULMED. 

